1.14 FLEXCOM TWI (I2C) EEPROM
This example application shows how to use the FLEXCOM module in TWI mode.
Description
This application configures the FLEXCOM peripheral in TWI mode to read and write data from an external EEPROM memory chip. Data is written to the EEPROM and then read back and compared. Successful comparison is indicated by turning on an LED.
Downloading and Building the Application
To clone or download this application from Github, go to the main page of this repository and then click Clone button to clone this repository or download as zip file. This content can also be downloaded using content manager by following these instructions.
Path of the application within the repository is apps/flexcom/flexcom_twi_eeprom/firmware.
To build the application, refer to the following table and open the project using its IDE.
| Project Name | Description |
|---|---|
| sam_9x60_curiosity.X | MPLABX project for SAM9X60 Curiosity Development Board |
Setting Up AT91Bootstrap Loader
To load the application binary onto the target device, we need to use at91bootstrap loader. Refer to the at91bootstrap loader documentation for details on how to configure, build and run bootstrap loader project and use it to bootstrap the application binaries.
Setting Up the Hardware
The following table shows the target hardware for the application projects.
| Project Name | Description |
|---|---|
| sam_9x60_curiosity.X | SAM9X60 Curiosity Development Board |
Setting Up SAM9X60 Curiosity Development Board
- Connect a programming cable from JTAG connector J12 on board to programmer(J-32 Debugger).
- Connect programmer(J-32 Debugger) to computer using a micro USB cable.
- Connect the USB port J1 on board to the computer using a micro USB cable
(to power the board).Note: No external hardware is required as on-board EEPROM 24AA025E48 used in demo.
Running the Application
- Build and program the application using its IDE
- LED indicates the success or failure:
- LED is turned ON when the value read from the EEPROM matched with the written value
- LED is turned OFF when the value read from the EEPROM did not match with the written value
| Board | LED Name |
|---|---|
| SAM9X60 Curiosity Development Board | RGB_LED (Green) |